peterson



Nov. 27, 1923 E. L. PETERSON CONCRETE PIPE JOINT 1920 2 Sheets-Sheet 1 Filed Aug.

H1 32. INVENTOR EHRL L. PE ERSON ATTORNEYS Nov. 27, 1923 1,475,867

E. L. PETERSON CONCRETE PIPE JOINT Filed Aug. 10 1920 2 Sheets-Sheet 2 INVENTOR EHR'L L. PETERSON km W ATTORNEYS Patented Nov. 27, 1923.

nmrsn STATES PATENT OFFICE.

EARL L. PETERSON, OF CORONA, HE /V YOEK. ASSIGNOR TU UNITED CONCRETE PIPE COMPANY, OF NEXV YORK, N. 1.. I: CORPGEZATEON 0F DELATVAHE.

CONCRETE-PIPE JOINT.

Application filed August 10, 1920.

To (ZZZ whom it may concern Be it known that 1, Earn L. Pn'rnnsox, a citizen of the United States of America, residing at Corona, in the county of Queens, Long Island, and State of New York, have invented certain new and useful Improvements in Concrete-Pipe Joints, of which the following is a specification.

My invention relates to pipe joints, and particularly to joints between concrete pipe sections, the object of my invention being to provide a oint of improved character which, in certain types of construction attord flexibility between the pipe sections.

111 the accompanying drawings Fig. 1 is an end elevation of a bell end pipe having lateral securing flanges;

Fig. 2 is a horizontal section through a joint between a pipe of the type shown in Fig. 1 and a co-operating pipe with spigot end adapted to make joint therewith;

Fig. 3 is an end elevation oi a pipe of modified construction; and

Fig. 4 is a horizontal section through a joint between a pipe of the type shown in Fig. 3, and a cooperating pipe with spigot end adapted to make joint therewith.

In submerged pipe lines, it is desirable to afl'ord a joint between pipe sections which will permit of a certain amount of flexion without rupture incident to the strains imposed upon the line by wave action, tides, etc. The construction shown in Figs. 1 and 2 attains such flexibility, while at the same time maintaining the joint tight within the range of movement permitted between the pipe sections.

As here shown the pipe 5 is recessed to form a bellend, the bearing surface 6 of the bell being formed on a curve after "the fashion of a ball joint. The co-operating pipe section 7 has a projecting spigot flange 8, the outer face 9 of which is similarly curved to bear against and make joint with the curved face 6 of the bell of pipe 5. For the sake of illustrating the construction, the surfaces are shown in Fig. 2 as slightly spaced apart. In an actual installation the joint surfaces 6 and 9 meet, while the end faces 10 and 11 of the pipe sections are spaced apart in the closed joint to afford a clearance, which permits predetermined freedom of angular displacement of the sections Without parting at the cooperating joint surfaces.

Serial No. 402,642.

in order to secure the pipe sections together, i provide external flanges 12 and 13 on opposite sides oi the pipe ends, and these flanges are slotted at let to receive the securing bolts 15. The slots l4: extend a pre determined distance on opposite sides of the spring line 16 ot' the pipe. 111 assembling a submerged pipe line, *are should be taken to have the center line of the flanges l2 and 13 substantially horizontal, so that the bolts to which pass through the holes let therein lie. substantially on the spring line of the pipe.

When the joint has been made it is obvious that by reason of the ball joint surfaces 6 and 5) of the co-operating pipe ends and the play of the bolts 15 in the slots 14, there is limited freedom of angular displacement while the joint is maintained tight and without rupture of either the bolts 15 or the flanges 12 and 13 through which they pass. W hen the pipes are flexed upward the bolts 15 rise in the slots 14. \Vhen they are flexed downward the bolts move downward in the slots. It will be noted that the slots are :iormed on a curve coaxial with the pipe, so that the bolt slides therein no strains are imposed on it or on the flanges except the tensional strains which both are designed to bear, and by which the pipes are held together.

lVhile this construction is of particular value in a submerged pipe line subject to Ziexion, it is especially valuable in a land installation in which the line is curved either laterally or vertically. (H course when the curve is lateral, the flanges 12 and should be arranged in vertical position.

In Figs. 8 and i I have shown the pipe sections 17 and 18 provided with bell 11) and spigot 20, respectively. The joint surfaces in this construction are frustro conical and not spherical, as in the previous construction. Flexibility, therefore, is not possible. ti. this joint without either opening it or ri'ipturing the union. In order to maintain the joint tight, I provide the pipe ends with annular flanges 21 and 22 respectively. which have a series of arcuate slots 23 formed therein to receive the draw-up lTOltS 24.

here the pipe is laid submerged, or parti ally submerged, as would generally be the case for pipe of this type, it is desirable to pump out the line after it is laid so that the inner face of the joint may be sealed With grouting 25. A. temporary seal at the joint may be effected by arranging between the pipe ends, outside the grout-seal area a packing 26 of any suitable sort. er the bolts have been tightened, the joint is temporarily sealed, so that there is 110 leakage during the pumping out operation, or during the troweling oi? the grout 25 into the inner portion of the joint area.

The arcuate form of the bolt slots lessens the relative rotary adjustment ot pipes to bring the slots into sufficient register to receive the bolts. There is of course no movement of the bolts in the slots after the pipes are assembled. The strains inci dent to expansion and contraction may be taken care of by placing beneath the head ol 'the bolt and nut, respectively, heavy spring Washers 27, which take up the relative movement between the parts, and prevent rupture of the flanges.

Various modifications of construction Will readily occur to those dealing with the prohlem, and I do not limit my invention to the precise structure shown, which is merely an illustrative embodiment of what I claim as my invention.

I claim- In a concrete pipe joint bell and spigot pipe ends h surtaces curved to form 2 and integral therewith, and draw-in bolts engaging said flanges and located on the same diameter of the pipe said flanges be ing slotted to permit the tillWdlp bolts to Work therein on fiexion at he joint 2. In a concrete pipe joint (re-operating ball and spigot pipe ends having their joint surfaces curved to form a ball joint external flanges on the respective pipe ends and integral therewith, and draw-up bolts engaging said flanges and located on the same diameter of the pipe said flanges having areuate slots through which the bolts pass. an d in which they are free to Work on {ienion at the joint.

In testimony whereof I have signed my name to this specification.

EARL L. PETE SON 

